1: "Gibbs' Absence in NCIS' 1000th Episode Raises Concerns"

2: "Fans Disappointed by Gibbs' Missing Role in Milestone Episode"

3: "Speculation Surrounding Mark Harmon's Decision to Sit Out"

4: "Gibbs' Impact on NCIS and Fans' Reactions to His Absence"

5: "Could Gibbs' Absence Have a Lasting Effect on the Show?"

6: "The Significance of Gibbs' Character in NCIS' Legacy"

7: "Fans Express Frustration Over Gibbs' Missing Presence"

8: "What Does Gibbs' Absence Mean for the Future of NCIS?"

9: "The Fallout of Gibbs' Absence in NCIS' 1000th Episode"